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Bug 1055854 - [RFE][nova]: Run multiple caching schedulers
Summary: [RFE][nova]: Run multiple caching schedulers
Keywords:
Status: CLOSED UPSTREAM
Alias: None
Product: Red Hat OpenStack
Classification: Red Hat
Component: RFEs
Version: unspecified
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
: ---
Assignee: RHOS Maint
QA Contact:
URL: https://blueprints.launchpad.net/nova...
Whiteboard: upstream_milestone_none upstream_stat...
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2014-01-21 05:01 UTC by RHOS Integration
Modified: 2015-03-19 17:08 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: Enhancement
Doc Text:
Clone Of:
Environment:
Last Closed: 2015-03-19 17:08:55 UTC
Target Upstream Version:


Attachments (Terms of Use)

Description RHOS Integration 2014-01-21 05:01:49 UTC
Cloned from launchpad blueprint https://blueprints.launchpad.net/nova/+spec/caching-scheduler-multi-host-decentralised.

Description:

Extend the caching scheduler with some resource locking to enable the running of multiple schedulers when running the caching scheduler.

The idea involves:
* talking a lock (with timeout) of resources from compute resource manager
* refreshing the resource manager lock to prevent timeouts
* attempt to reduce resource races before adding into cache, and reduce races removing from cache
* running multiple schedulers, each with its own in-memory cache of decisions

A future idea could include:
* a shared cache between schedulers, possibly replacing the resource manager resource commit

Dependency:
this is dependent on the caching-scheduler working out OK

Specification URL (additional information):

None


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